Curated Video
Principle of Coagulase Test
Biochemical test- Coagulase test principle Requirement- 1 in 10 citrated plasma (citrated to present auto-coagulation in absence of coagulase enzyme) Principle Coagulase is an enzyme produced by S. aureus that converts (soluble)...
Curated Video
Indole Test Principle
Biochemical test- Indole test Principle Media- Sterile 1% tryptone water Reagent- Kovacs reagent Principle- Tryptophan is an essential amino acid that can undergo oxidation by way of the enzymatic activities of some bacteria. Conversion...
Curated Video
Capture, Mark, Recapture Method
The Capture-Mark-Recapture (CMR) method is an ecological technique used to estimate animal population sizes by capturing, marking, releasing, and later recapturing individuals to analyze the proportion of marked specimens. This...
Curated Video
Ames Test
Ames test was developed by Bruce N. Ames in 1970s to test for determining if the chemical is mutagens. Ames test it is a biological assay to assess the mutagenic potential of chemical compounds. It utilizes bacteria to test whether a...
Curated Video
Ames Test for the Detection of Potential Mutagen
The Ames test, developed by Bruce Ames in the 1970s, is a bacterial reverse mutation assay used to assess whether a chemical is a mutagen by observing its ability to induce reverse mutations in auxotrophic bacterial strains (e.g.,...
The Business Professor
Systems Approach to Management
Dr. Kyle Huff explains what is the Systems Approach to Management.
Visual Learning Systems
Food Webs
In this video students will learn how living things and nonliving things interact in ecosystems. Specific attention is given to identifying producers, consumers and decomposers. Vivid, live-action video shows these relationships in...
Professor Dave Explains
Population Ecology (Life Tables, Age Structure, Population Growth)
With an understanding of individual organisms, let's take a look at population ecology, which looks at the dynamics of populations of organisms. How do populations grow? How are they structured? What is their geography? There is a lot to...
Curated Video
I WONDER - What Is A Trophic Level?
This video is answering the question of what is a trophic level.
Visual Learning Systems
Ecosystems and Food Chains
In this video students will learn how living things and nonliving things interact in ecosystems. Specific attention is given to identifying producers, consumers and decomposers. Vivid, live-action video shows these relationships in...
Professor Dave Explains
How Genetics Interacts with Biological Anthropology
Once the field of genetics was developed, our understanding of biology was completely transformed. How did this specifically impact the field of anthropology? From Mendel's laws to the Human Genome Project, let's learn about how our...
Curated Video
Amoebas: The Brainless Wonder of the Animal Kingdom
In this video, we learn about the fascinating amoeba, an organism that has been around for billions of years and functions without a brain or multiple cells. Despite its simple appearance, the amoeba showcases remarkable movement through...
Visual Learning Systems
Summing Up
In this video students will learn how living things and nonliving things interact in ecosystems. Specific attention is given to identifying producers, consumers and decomposers. Vivid, live-action video shows these relationships in...
Curated Video
The Science of Cloning: From Fiction to Reality
This video discusses the concept of cloning, explaining the different types of cloning and providing examples of cloned animals. It also addresses the misconception that clones always look identical, highlighting that while clones are...
Curated Video
Especie indicadora
Organismo cuya presencia o ausencia indica que se da una condición ambiental determinada.
Twig - Biología
Science ABC
What is Evolution: A REALLY SIMPLE and Brief Explanation
Evolution is the net change in organisms or a population over the span of many generations. This change in organisms or populations happens through DNA mutations and reconbination and is passed down to the next generation through...
Science ABC
What are Mutations and what are the different types of Mutations?
A mutation is a random change in the DNA. Mutations can be neutral, which means it does not cause a change in a trait of the organism, or it could cause a beneficial or a harmful mutation. There are a few different types of mutations -...
Science ABC
Neanderthals Vs Homo Sapiens: Different Species Or Subspecies?
Most people believe that Homo sapiens are the only humans to have ever walked the face of the Earth. However, this isn’t true. We just happen to be the only human species left. The ever-so-familiar portrait of an ape evolving into a Homo...
Curated Video
Infectious
An infectious disease is one caused by a biological agent such as a virus, bacterium, or fungi, that can be passed from one organism to another. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning...
Curated Video
Eukaryote
Organisms whose cells contain complex membrane-bound structures, called organelles. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science...
Curated Video
Phenotype
The observable physical and behavioural characteristics of an organism. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films...
Curated Video
Microorganism
Or microbe, is an organism too small to be seen by the human eye. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce...
Curated Video
Cell cycle
The cycle of events involved in normal cell growth and division, in multicellular organisms. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...
Curated Video
Gamete
A reproductive cell, such as a sperm or egg cell. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary Films reinforce abstract...